正电胶聚合醇钻井液不能满足探井和特殊井的施工要求。（）
参考答案：错
The president took immediate steps ________ the improvement of the poor’s living conditions.
A．contributed to
B．contribute to
C．contributing to
D．be contributed to
保险是通过风险分摊的方法，对被保险的损失进行一定的经济补偿，其四大核心要点是什么？
